bsen15655-20xxductileironpipesfittingsandaccessoriesinternalpolyurethaneliningforpipesandfit

bsen15655-20xxductileironpipesfittingsandaccessoriesinternalpolyurethaneliningforpipesandfit内容摘要：

est methods EN 598:2020, Ductile iron pipes, fittings, accessories and their joints for sewerage applications — Requirements and test methods EN 969, Ductile iron pipes, fittings, accessories and their joints for gas pipelines — Requirements and test methods EN ISO 4624, Paints and varnishes — Pulloff test for adhesion (ISO 4624:2020) ISO 62:2020, Plastics — Determination of water absorption ISO 527–3:1995, Plastics — Determination of tensile properties – Part 3: Test conditions for films and sheets ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness) ISO 8501–1:2020, Representative photographic examples of the change of appearance imparted to steel when blastcleaned with different abrasives ISO 8503–1:1988, Preparation of steel substrates before application of paints and related products — Surface roughness characteristics of blastcleaned steel substrates — Part 1: Specifications and definitions for ISO surface profile parators for the assessment of abrasive blastcleaned surfaces 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ductile iron cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal form adhesion force per unit area, applied perpendicular to the surface, which is necessary to separate the lining from its substrate indirect impact strength impact energy applied from outside of the pipe with deformation to which a lining can withstand without damage under defined test conditions 6 BS EN 15655:2020 EN 15655:2020 (E) hardness resistance of the lining to the peration of a ball under defined test conditions minimum lining thickness lower limit calculated for the polyurethane lining thickness by the mean value (x) minus two times the standard deviation () non porosity absence of holidays in a high voltage test under defined test conditions polyurethane lining factory applied lining which consists of polyurethane on the inside of the pipe or fitting Key 1 gasket seat 2 pipe barrel 3 spigot end 4 lining 5 internal socket profile Figure 1 — Location of the defined pipe areas Key 1 lining 2 internal socket profile Figure 2 — Location of the defined fitting areas 7 BS EN 15655:2020 EN 15655:2020 (E) specific lining resistance surface related electric resistance of the lining perpendicular to the pipe wall performance test test which is done once and is repeated according to a schedule or after relevant change of lining material and/or material supplier or change in process application routine test test carried out to control the manufacturing process with a frequency defined by the manufacturer 4 Ordering information The following information shall be supplied to the manufacturer by the purchaser. Ductile iron pipes according to EN 545, EN 598 or EN 969 but internally coated in accordance with this European Standard shall be specified in the purchaser39。 s enquiry and order by reference to this standard, .  5 000 m of ductile iron pipe DN 300 according to EN 545, internal polyurethane lining according to EN 15655。 or  10 pieces of ductile cast iron fittings DN 300 according to EN 598, internal PURlining according to EN 15655. 5 Technical Requirements Surface preparation Prior to application of the polyurethane lining, the surface of the pipes or fittings to be lined shall be clean, free of rust, loose constituent materials, dirt, oil, grease and moisture. In cold weather, or anytime when the moisture tends to condense on the surface of the pipe or fitting, it shall be uniformly warmed for sufficient time to dry prior to cleaning. The surface temperature shall be maintained at least 5 176。 C above the dew point. The surface shall be prepared by grinding (only for pipes) and grit blasting and be in pliance with level Sa of ISO 85011 when checked according to . The surface roughness Ra in accordance with ISO 85031 shall be at least 12,5 micrometers which is equivalent to an anchored profile Rz of 63 micrometers or higher if required by the lining material provider or manufacturer. Finished polyurethane lining Appearance and continuity The polyurethane lining shall be of:  uniform colour, except the spigot end and the internal socket profile which may be of a different colour and different coating material。  uniform appearance and smoothness except for admissible repairs。  free of visible defects (pinholes, bubbles, blisters, wrinkles, cracks or voids). 8 BS EN 15655:2020 EN 15655:2020 (E) Slight superficial variations of colour or brilliance due to repairs or prolonged exposure to sunlight or contact with other pipes are permissible. Minimum lining thickness When measured in accordance with , the lining thickness shall be as indicated in Table 1a for drinking water application and in Table 1b for waste water application. Table 1a — Lining thickness of pipes and fittings for drinking water transport according to EN 545 DN mean value x m (x2) m 80 200  1 300  800  200  1 500 Table 1b — Lining thickness of pipes and fittings for waste water transport according to EN 598 DN mean value x m (x2) m 80 200  1 300  800 250 700  1 500  800 700 – 1 000  1 800  1 000  1 000  2 000  1 000 Pipe ends Spigot end and internal socket profile (see Figure 1) shall be coated with one of the following:  epoxy lining in accordance with EN 14901。  polyurethane in accordance with this standard with a minimum lining thicknes。